On Type II strings in exact superconformal non-constant RR backgrounds

TL;DR

This paper provides an exact superconformal framework for certain Type II string theories in non-constant RR backgrounds, expanding the understanding of their conformal invariance and solutions.

Contribution

It introduces a new set of exact Type II string solutions with non-constant RR curvatures using the (2,2) approach of Berkovits and Maldacena.

Findings

New exact Type IIA strings with non-constant RR 2-form and 4-form curvatures.

Type IIB strings with non-constant 3-form curvature.

Explicit superconformal description of these backgrounds.

Abstract

An explicitly exact superconformal description is provided to some classes of Type II string theories in non constant RR backgrounds. This is done by applying the manifest (2,2) approach of Berkovits and Maldacena to Type II strings and by studying the condition of exact conformal invariance of certain supersymmetric backgrounds. We find a new set of exact type IIA strings with non constant RR 2-form and 4-form curvatures and for type IIB with non constant 3-form curvature.